After discovering her husband's infidelity and being neglected by him, wife Kyoko finds herself emotionally shattered. One day, she discovers a suspicious clump of tissues in her son's room, pushing her to the breaking point. Unable to endure any longer, Kyoko heads to her son's room that night. Amidst a whirlwind of emotions, the path she chooses unfolds in a shocking narrative that explores intense feelings and the deep, complicated bonds of family.